<script>
import {nextTick, onMounted, reactive, ref, toRefs} from "vue";

export default {
  name: "Home",
  computed: {
    state() {
      return state
    }
  },
  components: {
    GoodItem,
    Swiper,
    NavBar
  },
  setup() {
    const state = reactive({
      isLogin: false, // 声明是否登录变量
      swiperList: [],
      categoryList: [
        {
          name: '新蜂超市',
          imgUrl: 'https://s.yezgea02.com/1604041127880/%E8%B6%85%E5%B8%82%402x.png',
          categoryId: 100001
        }, {
          name: '新蜂服饰',
          imgUrl: 'https://s.yezgea02.com/1604041127880/%E6%9C%8D%E9%A5%B0%402x.png',
          categoryId: 100003
        }, {
          name: '全球购',
          imgUrl: 'https://s.yezgea02.com/1604041127880/%E5%85%A8%E7%90%83%E8%B4%AD%402x.png',
          categoryId: 100002
        }, {
          name: '新蜂生鲜',
          imgUrl: 'https://s.yezgea02.com/1604041127880/%E7%94%9F%E9%B2%9C%402x.png',
          categoryId: 100004
        }, {
          name: '新蜂到家',
          imgUrl: 'https://s.yezgea02.com/1604041127880/%E5%88%B0%E5%AE%B6%402x.png',
          categoryId: 100005
        }, {
          name: '充值缴费',
          imgUrl: 'https://s.yezgea02.com/1604041127880/%E5%85%85%E5%80%BC%402x.png',
          categoryId: 100006
        }, {
          name: '9.9元拼',
          imgUrl: 'https://s.yezgea02.com/1604041127880/9.9%402x.png',
          categoryId: 100007
        }, {
          name: '领劵',
          imgUrl: 'https://s.yezgea02.com/1604041127880/%E9%A2%86%E5%88%B8%402x.png',
          categoryId: 100008
        }, {
          name: '省钱',
          imgUrl: 'https://s.yezgea02.com/1604041127880/%E7%9C%81%E9%92%B1%402x.png',
          categoryId: 100009
        }, {
          name: '全部',
          imgUrl: 'https://s.yezgea02.com/1604041127880/%E5%85%A8%E9%83%A8%402x.png',
          categoryId: 100010
        }
      ],
      newGoodses: [], // 最新商品列表变量
      hots: [], // 热门商品列表变量
      recommends: [], // 推荐商品变量
      loading: true,
      headerScroll: false, // 滚动透明判断
    })
    onMounted(async () => {
      const token = getLocal('token')
      if (token){
        // 当有token时，说明已经登录，将isLogin设置为true
        state.isLogin = true
      }
      const {data} = await getHomeInfo()
      // 接口返回字段描述
      state.swiperList = data.carousels
      state.newGoodses = data.newGoodses
      state.hots = data.hotGoodses
      state.recommends = data.recommendGoodses
      state.loading = false
    })
    // 前往商品详情页面
    const goToDetail = (id) => {
      console.log('前往商品详情页面',id)
    }
    nextTick(() => {
      document.body.addEventListener('scroll', () => {
        let scrollTop = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop
        scrollTop > 100 ? state.headerScroll = true : state.headerScroll = false
      })
    })
    return {
      ...toRefs(state),
      goToDetail,
    }
  }
}
import NavBar from "components/NavBar.vue";
// 引入接口方法
import {getLocal} from "utils/help.js";
import Swiper from "components/Swiper.vue";
import {getHomeInfo} from "service/home.js";
import state from "store/state.js";
import GoodItem from "components/GoodItem.vue";
</script>

<template>
  <div>
<!--    头部搜索框-->
<!--    通过headerScroll变量为true或者false 动态添加或者删除active类名-->
    <header class="home-header wrap" :class="{ 'active' : headerScroll }">
<!--      使用vur-router提供的组件进行跳转，不需要写方法，直接使用to属性进行页面跳转-->
      <router-link to="./category">
<!--        分类图标-->
        <i class="nbicon nbmenu2"/>
      </router-link>
<!--      搜索框内容-->
      <div class="header-search">
        <span class="app-home">新蜂商城</span>
        <i class="iconfont icon-search"></i>
<!--        单机后跳转商品搜索列表-->
        <router-link class="search-title" to="./product-list">
          山河无恙 境焕加油
        </router-link>
      </div>
<!--        跳转个人中心页面-->
        <router-link class="login" to="./login" v-if="!isLogin">登录</router-link>
        <router-link class="login" to="./user" v-else>
          <van-icon name="manager-o"/>
        </router-link>
    </header>
<!--    轮播图组件-->
    <swiper :list="swiperList"></swiper>
<!--    导航栏模块-->
    <div class="category-list">
      <div v-for="item in categoryList" :key="item.categoryId" @click="tips">
        <img :src="item.imgUrl"/>
        <span>{{ item.name }}</span>
      </div>
    </div>
    <div class="good">
      <header class="good-header">新品上线</header>
<!--      在数据未加载之前，使用骨架屏占位，提升页面的体验-->
      <van-skeleton title :row="3" :loading="loading">
        <div class="good-box">
          <template v-for="(item, index) in newGoodses" :key="item.goodsId">
          <good-item
                :cover="$filters.prefix(item.goodsCoverImg)"
                :name="item.goodsName"
                :price="item.sellingPrice"
                @goToDetail="goToDetail"
                :id="item.goodsId"
            ></good-item>
          </template>
        </div>
      </van-skeleton>
      <header class="good-header">推荐商品</header>
      <van-skeleton title :row="3" :loading="loading">
        <div class="good-box">
          <template v-for="(item,index) in recommends" :key="index">
            <good-item
                :cover="$filters.prefix(item.goodsCoverImg)"
                :name="item.goodsName"
                :price="item.sellingPrice"
                @goToDetail="goToDetail"
                :id="item.goodsId"
            ></good-item>
          </template>
        </div>
      </van-skeleton>
    </div>
<!--    公用底部导航栏-->
    <nav-bar/>
  </div>
</template>

<style lang="less" scoped>
@import "../theme/custom";
.home {
  height: 100%;
  overflow: hidden;
  overflow-y: scroll;
}
.home-header {
  position: fixed;
  left: 0;
  top: 0;
  .wh(100%,50px);
  .fj();
  line-height: 50px;
  padding: 0 15px;
  .boxSizing();
  font-size: 15px;
  color: #fff;
  z-index: 10000;
  .nbmenu2 {
    color: @primary;
  }
  &.active {
    background: @primary;
    .nbmenu2 {
      color: #fff;
    }
    .login {
      color: #fff;
    }
  }
  .header-search {
    display: flex;
    .wh(74%,30px);
    line-height: 20px;
    margin: 10px 0;
    padding: 5px 3px 0;
    color: #232326;
    background: rgba(255,255,255,.7);
    border-radius: 20px;
    .app-name {
      padding: 0 10px;
      color: @primary;
      font-size: 20px;
      font-weight: bold;
      border-right: 1px solid #666;
    }
    .icon-search{
      padding: 0 10px;
      font-size: 17px;
    }
    .search-title {
      font-size: 12px;
      color: #666;
      line-height: 21px;
    }
    .icon-iconyonghu{
      color: #fff;
      font-size: 22px;
    }
    .login {
      color: @primary;
      line-height: 52px;
      .van-icon-manager-o {
        font-size: 20px;
        vertical-align: -3px;
      }
    }
  }
}
.category-list{
  display: flex;
  flex-shrink: 0;
  flex-wrap: wrap;
  width: 100%;
  padding-bottom: 13px;
  div {
    display: flex;
    flex-direction: column;
    width: 20%;
    text-align: center;
    img {
      .wh(36px,36px);
      margin: 13px auto 8px auto;
    }
  }
}
.good{
  padding-bottom: 50px;
  .good-header{
    background: #f9f9f9;
    height: 50px;
    line-height: 50px;
    text-align: center;
    color: @primary;
    font-size: 16px;
    font-weight: 500;
  }
  .good-box{
    display: flex;
    justify-content: flex-start;
    flex-wrap: wrap;
  }
}
</style>
